1. Pixel Bishop is a professional trigger remote control with the function of group flash. 2. The hot shoe on Transmitter supports TTL and triggers the off-camera flash synchronized. 3. With the function of wake-up, it can auto wake up the sleeping flash without manual operation. 4. It can control studio light through 3.5mm port, the speed of synchronzed shutter is up to 1/250s. · Full I-TTL / E-TTL hot shoe pass through on the transmitter · Wireless receiver is manual only (NO TTL) · Up to 1/250s shutter speed, user friendly design Specification: · 2.4 GHz High-speed 2-ways communication system · 200m operating range, 3 grouping, 7 wireless channel · Runs on 2 x AA battery each (not included) · PC sync output, metal hot-shoe Kit contains:1x transmitter1x receiver *Studio cable available separately*Camera, lens & flash not included,